My now wife picked me up in a bar in 1992.
After we met, it was clear that we had been frequenting the same bars for about three years, and had attended many shows together/apart, but neither of us had any recollection of recognizing each other at any prior point. The shows were significant acts (for example, an ear bleedingly loud Bob Mould at the Green Parrot in Neptune NJ) that had to be the same show, could not possibly have been a different weekend with some common local band.
But there you have it. No contact until she noticed me sitting at the bar watching a live band at a worn out dive bar/night club, and wanted to know what my T-shirt said. She was drunk. She was adorable. I was smitten.